双通套管用于箱变高压引入线，为变压器系统提供过电压保护时安装时型避雷器使用。也可以将箱变终端接线转变为环网型接线。内部导电结构为一体式铜锻压件，电阻比其它同类焊接式双通套管小100uQ运行时温升更低。独特的限制扭矩结构，确保套管座内螺栓不会被拧断。内置式拔插增力设计，可确保400N的拔插力，使用安全可靠，不会松脱退出引起事故。

The double-pass bushing is used for high -voltage lead-in line of the transformerand providing over-voltage protection for transformer system during installation. lt isused for surge arrester. lt can convert terminal wiring of the transformer into RMUwiring. The internal conductive structure is integrated copper forging, and the resistanceis 100u, smaller than other similar welded double-pass bushings. The temperature islower when running.The unique limited torque structure ensures that the boits in thebushing well will not be broken. Built-in plug-in design can ensure 400N plug-out force.Its use is safe and reliable, and will not cause accidents due to loosening andwithdrawal.